Extracts a stack trace from captured browser-specific stackdata.
If no stack trace state has been recorded, or if the state cannot be
analyzed in meaningful way (because we don't know the browser), an
empty array is returned.

Extracts a throwable's stack trace from captured browser-specific state.
If no stack trace state has been recorded, or if the state cannot be
analyzed in meaningful way (because we don't know the browser), an
empty array is returned.